| CLASSROOMS | • classrooms n. Plural of classroom. • CLASSROOM n. a room in which children are confined, nominally for purposes of instruction. |
| COMMISSARS | • commissars n. Plural of commissar. • COMMISSAR n. the head of a government department in the USSR. |
| COSEISMALS | • coseismals n. Plural of coseismal. • COSEISMAL n. a coseismal line, also COSEISMIC. |
| CROSSBEAMS | • crossbeams n. Plural of crossbeam. • CROSSBEAM n. a beam joining other beams. |
| GASCONISMS | • Gasconisms n. Plural of Gasconism. • GASCONISM n. boastfulness. |
| MASOCHISMS | • masochisms n. Plural of masochism. • MASOCHISM n. the derivation of sexual gratification from the suffering of pain. |
| MASOCHISTS | • masochists n. Plural of masochist. • MASOCHIST n. one who derives sexual gratification from the suffering of pain. |
| MOSAICISMS | • mosaicisms n. Plural of mosaicism. • MOSAICISM n. the property or state of being composed of cells of two genetically different types. |
| MOSAICISTS | • mosaicists n. Plural of mosaicist. • MOSAICIST n. a worker in mosaic. |
| OSTRACISMS | • ostracisms n. Plural of ostracism. • OSTRACISM n. expulsion from society. |
| SARCOSOMES | • sarcosomes n. Plural of sarcosome. • SARCOSOME n. a mitochondrion of a striated muscle fire. |
| SOCIALISMS | • socialisms n. Plural of socialism. • SOCIALISM n. the theory, principle, or scheme of social organization which places the means of production of wealth and the distribution of that wealth in the hands of the community. |
| SOMASCOPES | • somascopes n. Plural of somascope. • SOMASCOPE n. an instrument detecting disease of the internal organs by 'echo-sounding' methods and producing images of the diseased tissue on a television screen. |
| SUBMUCOSAS | • submucosas n. Plural of submucosa. • SUBMUCOSA n. the connective tissue underlying a mucous membrane. |
| SYMPOSIACS | • symposiacs n. Plural of symposiac. • SYMPOSIAC n. a symposium. |